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Phys. Rev. B 70, 075310 (2004) [6 pages]

Reentrant localization of single-particle transport in disordered Andreev wires

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N. B. Kopnin1,2, A. S. Mel’nikov3,4, and V. M. Vinokur4
1Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Finland
2L. D. Landau Institute for Theoretical Physics, 117940 Moscow, Russia
3Institute for Physics of Microstructures, Russian Academy of Sciences 603950, Nizhny Novgorod, GSP-105, Russia
4Argonne National Laboratory, Argonne, Illinois 60439, USA

Received 12 March 2004; published 23 August 2004

We study effects of disorder on the low energy single-particle transport in a normal wire surrounded by a superconductor. In addition to the Andreev diffusion that decreases with increase in the mean free path ℓ, the heat conductance is found to include the diffusive drift produced by a small particle-hole asymmetry, which increases with increasing ℓ. The conductance thus has a minimum as a function of ℓ leading to a peculiar reentrant localization as a function of the mean free path.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.075310
DOI:
10.1103/PhysRevB.70.075310
PACS:
73.23.−b, 74.45.+c, 74.78.−w
 
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